[Lazarus] Decision required WRT dragging

Hans-Peter Diettrich DrDiettrich1 at aol.com
Fri Mar 30 09:54:57 CEST 2012

Paul Ishenin schrieb:
> 30.03.12 5:24, Hans-Peter Diettrich wrote:
>> So what should happen in such a case, where the developer didn't observe
>> the rules? Should it be considered a fatal bug, and raise an exception?
> It is a normal situation when something is docked and have DragKind <> 
> dkDock even I have no chance do undock it by mouse. If it works so it 
> means that developer make it work so.

At least the IDE developer had a different intention.

> It is useful in some situations 
> and moreover I use this in my work projects when I want for example to 
> integrate some form which may be a dialog in some cases into another 
> form panel.
> So when form is manually docked with DragKind <> dkDock is not a bug in 
> LCL and LCL should not change this property.

But it's required to make the IDE dockable.

> If you oversve that some docked form should be undocked via mouse in IDE 
> please change this in IDE.

Not me :-(

>>> You need to find the control which changes the capture diring the drag
>>> and fix this control code.
>> What do you need more than setting an breakpoint?
> Why should I do this if IDE docking has not 1.0 target?

Because it does not only affect the IDE, but dragging in general. 
Consequently 1.0 will not properly support dragging, in all applications.

> That was your patch. The patch had target 0.99 and I reviewed it. The 
> patch is wrong. If you want to fix IDE docking problems please submit 
> another patch which does not break LCL behavior.

I'm tired of supplying patches which then are rejected, and searching 
bugs in deliberately broken code. Docking worked fine in earlier Lazarus 


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